6.6
Medium
CVE-2026-33174 Active Storage allows users to attach cloud and local files in Rails applications
Description
Active Storage allows users to attach cloud and local files in Rails applications. Prior to versions 8.1.2.1, 8.0.4.1, and 7.2.3.1, when serving files through Active Storage's proxy delivery mode, the proxy controller loads the entire requested byte range into memory before sending it. A request with a large or unbounded Range header (e.g. `bytes=0-`) could cause the server to allocate memory proportional to the file size, possibly resulting in a DoS vulnerability through memory exhaustion. Versions 8.1.2.1, 8.0.4.1, and 7.2.3.1 contain a patch.
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| activestorage 8.1 | 8.1.0.beta1 → < 8.1.2.1 | 8.1.2.1 |
| activestorage 8.0 | 8.0.0.beta1 → < 8.0.4.1 | 8.0.4.1 |
| activestorage 7.2 | earliest → < 7.2.3.1 | 7.2.3.1 |
References
- github.com github.com
- github.com github.com
- github.com github.com
- github.com github.com
- github.com github.com
- github.com github.com
- github.com github.com
Timeline
- Published
- Last modified
Other CVEs of activestorage
The 6 CVEs of activestorage →
CVE-2026-33658
Active Storage allows users to attach cloud and local files in Rails applications
2.3
Low
CVE-2026-33202
Active Storage allows users to attach cloud and local files in Rails applications
6.6
Medium
CVE-2026-33195
Active Storage allows users to attach cloud and local files in Rails applications
8.0
High
CVE-2026-33173
Active Storage allows users to attach cloud and local files in Rails applications
5.3
Medium